ASME SA-29-2007 pdf download
ASME SA-29-2007 pdf download.SPECIFICATION FOR STEEL BARS, CARBON AND ALLOY, HOT-WROUGHT AND COLD-FINISHED, GENERAL REQUIREMENTS FOR.
A 700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Domestic Shipment A 751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E 112 Test Methods for Determining the Average Grain Size 2.2 Federal Standards: Fed. Std. No. 123 Marking for Shipment (Civil Agencies) Fed. Std. No. 183 Continuous Identification Marking of Iron and Steel Products 2.3 Military Standard: MIL-STD-163 Steel Mill Products —Preparation forShip- ment and Storage 2.4 Other Standards: AIAG B-1 Bar Code Symbology Standard for 3-of-9 Bar Codes AIAG B-5 02.00 Primary Metals Tag Application Standard 3. Terminology 3.1 Definitions ofTerms Specific To This Standard: 3.1.1 Hot-Wrought Steel Bars — Steel bars produced byhotforming ingots, blooms, billets, orothersemifinished forms to yield straight lengths (or coils, depending upon size, section, and mill equipment) in sections which are uniform throughout their length, and in the following sec- tions and sizes: 3.1.1.1 Rounds, 7 ⁄ 32 to 10.0 in. [5.5 to 250 mm], inclusive, 3.1.1.2 Squares, 7 ⁄ 32 to 6.0 in. [6 to 160 mm], inclusive, 3.1.1.3 Round-Cornered Squares, 7 ⁄ 32 to 8.0 in. [6 to 200 mm], inclusive, 3.1.1.4 Flats, 1 ⁄ 4 to 8 in. inclusive, in width: 13 ⁄ 64 in. in minimum thickness up to 6 in. in width; and 0.230 in. in minimum thickness for over 6 to 8 in. in width, inclusive [over 5 mm in thickness up to 150 mm in width; and over 6 mm in thickness for over 150 mm through 200 mm in width]. Maximum thickness for all widths is 4 in. [100 mm]. 3.1.1.5 Hexagons and Octagons, 1 ⁄ 4 to 4 1 ⁄ 16 in. [6 to 103 mm], inclusive, between parallel surfaces, 3.1.1.6 Bar Size Shapes — Angles, channels, tees, zees, when theirgreatestcross-sectionaldimension is under 3 in. [75 mm], and 3.1.1.7 Special BarSections — Half-rounds, ovals, half-ovals, other special bar size sections.
3.1.2.1 Rounds, 9 in. [230 mm] and under in diameter, 3.1.2.2 Squares, 6 in. [150 mm] andunderbetween parallel surfaces, 3.1.2.3 Hexagons, 4 in. [100 mm] and under between parallel surfaces, 3.1.2.4 Flats, 1 ⁄ 8 in. [3 mm] and over in thickness and not over 12 in. [300 mm] in width, and 3.1.2.5 Special Bar Sections. 3.1.3 Lot— Unless otherwise specifiedin the contract or order, a lot shall consist ofall bars submitted for inspec- tion at the same time of the same heat, condition, finish, size, or shape. For bars specified in the quenched and tempered condition, when heat treated in batch-type fur- naces, a lot shall consist of all bars from the same heat, of the same prior condition, the same size, and subjected to the same heat treatment in one tempering charge. For bars specified in the quenched and tempered condition, when heat treated without interruption in a continuous- type furnace, a lot shall consist of all bars from the same heat, of the same prior condition, of the same size, and subjected to the same heat treatment. 4. Chemical Composition 4.1 Limits: 4.1.1 The chemical composition shall conform to the requirements specified in the purchase order or the individual product specifications. For convenience the grades commonly specified for carbon steel bars are shown in Tables 1 and 2. Bars may be ordered to these grade designations and when so ordered shall conform to the specified limits by heat analysis. 4.1.2 When compositions other than those shown in Tables 1 and 2 are required, the composition limits shall be prepared using the ranges and limits shown in Table 3 for carbon steel and Table 4 for alloy steel. 4.2 Heat or Cast Analysis: 4.2.1 The chemical composition of each heat or cast shall be determined by the manufacturer in accordance with Test Methods, Practices, and Terminology A 751. 4.2.2 The heat or cast analysis shall conform to the requirements specified in the product specification or pur- chase order.
4.3 Product Analysis: 4.3.1 Merchant quality carbon bar steel is not subject to rejection for product analysis unless misapplication of a heat is clearly indicated. 4.3.2 Analyses may be made by the purchaser from finished bars other than merchant quality representing each heatofopen-hearth, basic-oxygen, orelectric-furnace steel. The chemical composition thus determined shall not vary from the limits specified in the applicable specification by more than the amounts prescribed in Table 5 and Table 6, but the several determinations of any element, excluding lead, in a heat may not vary both above and below the specified range. Rimmed or capped steel is characterized by a lack of homogeneity in its composition, especially for the elements carbon, phosphorus, and sulfur; therefore, when rimmed or capped steel is specified or required, the limitations for these elements shall not be applicable. Because of the degree to which phosphorus and sulfur segregate, the limitations for these elements shall not be applicable to rephosphorized or resulfurized steels. 4.3.3 Samples for product analysis shall be taken by one of the following methods: 4.3.3.1 Applicable to small sections whose cross- sectional area does not exceed 0.75 in. 2 [500 mm 2 ] such as rounds, squares, hexagons, etc. Chips are taken by mill- ing ormachining the full cross section ofthe piece. Drilling is not a feasible method for sampling sizes 0.75 in. 2 2 and smaller.
